All things related to multicast

[Christian MacNevin <>]

Thanks a lot Stig and Mark - off for a few weeks so I'll check it all  
out when I get back.


On Nov 11, 2008, at 10:49 PM, Stig Venaas wrote:

Christian MacNevin wrote:
> Hi Stig,
> Somebody on the wg-multicast list mentioned that I had to pass the  
> -4 flag to get it to work. I'm not used to thinking in ip6 terms,
> so the [-46] bit of the command confused me i have to admit :S

ssmpingd doesn't take any arguments or flags though, so it doesn't do
anything. -4/-6 works with the client only.

> Anyhow, it works now, but I'm still getting the following as it runs:
> [rtv@lab26
>  ~]$ ssmpingd -4
> socket: Address family not supported by protocol
> errno=97

OK. What happens here is that on RHEL4 the function call getaddrinfo()
returns IPv6 info even if there is no IPv6 support. ssmpingd tries to
create both IPv4 and IPv6 sockets. The IPv6 one fails, but ssmpingd
should still work fine. So just ignore the output.

> This is the latest rpm i could find for RHEL4 something. I guess  
> this is unfortunately only 0.81, so it might be beyond the scope  
> you're
> bothered with. Actually if you have any idea if anyone's planning to  
> package 0.91, that'd be good to know, as mcfirst looks handy.

You can probably find some rpms around, but whether they work with RHEL4
I don't know.

If you want to try mcfirst, you may try to download the source code.
Hopefully it should be just a matter of typing "make". On Linux it
really should be.

Stig

> Thanks for the help, and obviously the application!
> Christian
> On Nov 11, 2008, at 1:05 AM, Stig Venaas wrote:
> Christian MacNevin wrote:
> > Hi there,
> >
> > So I'm trying to set up ssmping between a couple of hosts to test  
> > linux
> > kernel compatibility, but when I attempt to
> > run ssmpingd on either end, I'm getting an error message to the  
> > effect
> > of 'address family not supported by the protocol."
> >
> > Hoping somebody's seen this one before? It's a RHEL4 release.
> Haven't seen this before, but I'll try to help you out. Sounds like
> something IPv6 related... I would need to know more details though.
> o Which version of ssmping?
> And from source or RPM or...
> o Description of the problem
> Is this only at startup or when you receive a query? Does it exit or
> is the process still running?
> o Output
> It would be good to see exactly what the output is
> I guess it could also be useful to know kernel version and whether you
> have IPv6 configured (output of ifconfig -a might be of help).
> Stig